Beginning of soul system

src/main/java/com/wayoftime/bloodmagic/item/ItemMonsterSoul.java

@@ -0,0 +1,56 @@
+package com.wayoftime.bloodmagic.item;
+
+import com.wayoftime.bloodmagic.BloodMagic;
+import com.wayoftime.bloodmagic.core.util.register.IModelLocator;
+import com.wayoftime.bloodmagic.core.will.DemonWill;
+import com.wayoftime.bloodmagic.core.will.DemonWillHolder;
+import com.wayoftime.bloodmagic.core.will.IWillContainer;
+import net.minecraft.client.util.ITooltipFlag;
+import net.minecraft.creativetab.CreativeTabs;
+import net.minecraft.item.ItemStack;
+import net.minecraft.util.NonNullList;
+import net.minecraft.util.ResourceLocation;
+import net.minecraft.world.World;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.List;
+
+public class ItemMonsterSoul extends ItemMundane implements IWillContainer, IModelLocator {
+
+    public ItemMonsterSoul() {
+        super("monster_soul");
+
+        setMaxStackSize(1);
+        addPropertyOverride(new ResourceLocation(BloodMagic.MODID, "will"), (stack, worldIn, entityIn) -> {
+            DemonWillHolder holder = getDemonWill(stack);
+            return holder == null || holder.getType() == DemonWill.RAW ? 0F : Float.parseFloat("0." + holder.getType().ordinal());
+        });
+    }
+
+    @Override
+    public void getSubItems(CreativeTabs tab, NonNullList<ItemStack> items) {
+        for (DemonWill will : DemonWill.VALUES) {
+            ItemStack stack = new ItemStack(this);
+            applyDemonWill(stack, new DemonWillHolder(will, 0));
+            items.add(stack);
+        }
+    }
+
+    @Override
+    public void addInformation(ItemStack stack, @Nullable World worldIn, List<String> tooltip, ITooltipFlag flagIn) {
+        IWillContainer.appendTooltip(stack, tooltip);
+    }
+
+    @Override
+    public double getMaxContained(ItemStack stack) {
+        DemonWillHolder holder = getDemonWill(stack);
+        return holder == null ? Double.MAX_VALUE : holder.getAmount();
+    }
+
+    @Nonnull
+    @Override
+    public ResourceLocation getModelPath() {
+        return new ResourceLocation(BloodMagic.MODID, "soul/monster_soul");
+    }
+}